Hef’s Ex-Fiancee — My HUGE Engagement Ring is On the AUCTION BLOCK!

Filed under: Hugh Hefner, Crystal Harris, Weddings

A diamond isn’t always forever … sometimes it’s only for 6 months — especially for Hugh Hefner‘s ex-fiancee Crystal Harris … who just put her engagement ring on a pretty famous auction block!

TMZ has learned … the platinum ring, which boasts a 3.39 carat circular-cut diamond — will be auctioned off by Christie’s in NYC next month.

According to the listing, the ring is expected to sell somewhere in the range of $20 -$30k.

Sources close to Crystal tell us … the former Playboy model “couldn’t bear to look at the ring anymore because it brought back bad memories.”

Think how the guy who paid for that rock feels … right, Hef?